<template>
  <ul class="app-header-nav">
    <!-- {{$store.state.category.list}} -->
    <li class="home"><RouterLink to="/">首页</RouterLink></li>
     <li v-for="item in list" :key="item.id" @mousemove="show(item)" @mouseleave="hide(item)">
      <RouterLink :to="`/category/${item.id}`" @click="hide(item)">{{item.name}}</RouterLink>
      <div class="layer" :class="{open:item.open}">
          <ul>
            <li v-for="sub in item.children" :key="sub.id">
              <RouterLink :to="`/category/sub/${sub.id}`" @click="hide(item)">
                <img :src="sub.picture" alt="">
                <p>{{sub.name}}</p>
              </RouterLink>
            </li>
          </ul>
        </div>
    </li>
  </ul>
</template>

<script>
import {useStore} from 'vuex'
import {computed} from 'vue'
export default {
  name: 'AppHeaderNav',
  setup(){
    const store = useStore()
    //拿到xuex中的分类列表
    const list = computed(()=>{
      return store.state.category.list
    })
      const show = (item) => {
      store.commit('category/show', item)
    }
    const hide = (item) => {
      store.commit('category/hide', item)
    }
    return { list, show, hide}
  }
}
</script>

<style scoped lang='less'>
.app-header-nav {
  width: 820px;
  display: flex;
  padding-left: 40px;
  position: relative;
  z-index: 998;
 > li {
    margin-right: 40px;
    width: 38px;
    text-align: center;
   > a {
      font-size: 16px;
      line-height: 32px;
      height: 32px;
      display: inline-block;
    }
    &:hover {
     > a {
        color: @xtxColor;
        border-bottom: 1px solid @xtxColor;
      }
      //显示二级类目


    }
  }
}
//1.二级类名弹层
.layer {
    &.open {
    height: 132px;
    opacity: 1;
  }
  width: 1240px;
  background-color: #fff;
  position: absolute;
  left: -200px;
  top: 56px;
  height: 0;
  overflow: hidden;
  opacity: 0;
  box-shadow: 0 0 5px #ccc;
  transition: all .2s .1s;
  ul {
    display: flex;
    flex-wrap: wrap;
    padding: 0 70px;
    align-items: center;
    height: 132px;
    li {
      width: 110px;
      text-align: center;
      img {
        width: 60px;
        height: 60px;
      }
      p {
        padding-top: 10px;
      }
      &:hover {
        p {
          color: @xtxColor;
        }
      }
    }
  }
}
</style>
